23 citations · 39 across the 4 of their papers we have counts for
9 papers
Cutting Cosmological Correlators
Harry Goodhew, Sadra Jazayeri, Mang Hei Gordon Lee +1
The initial conditions of our universe appear to us in the form of a classical probability distribution that we probe with cosmological observations. In the current leading paradig…
From Locality and Unitarity to Cosmological Correlators
Sadra Jazayeri, Enrico Pajer, David Stefanyszyn
In the standard approach to deriving inflationary predictions, we evolve a vacuum state in time according to the rules of a given model. Since the only observables are the future v…
The Cosmological Optical Theorem
Harry Goodhew, Sadra Jazayeri, Enrico Pajer
The unitarity of time evolution, or colloquially the conservation of probability, sits at the heart of our descriptions of fundamental interactions via quantum field theory. The im…
The Cosmological Phonon: Symmetries and Amplitudes on Sub-Horizon Scales
Tanguy Grall, Sadra Jazayeri, David Stefanyszyn
In contrast to massless spinning particles, scalars are not heavily constrained by unitarity and locality. Off-shell, no gauge symmetries are required to write down manifestly loca…
Spatial Curvature at the Sound Horizon
Guus Avis, Sadra Jazayeri, Enrico Pajer +1
The effect of spatial curvature on primordial perturbations is controlled by , where is today's fractional density of spatial curvature and $ c_{s}…
Symmetric Scalars
Tanguy Grall, Sadra Jazayeri, Enrico Pajer
We provide a complete classification of Poincaré-invariant scalar field theories with an enlarged set of classical symmetries to leading order in derivatives, namely for the so-cal…